<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div :class="{on:loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone"/>
              <button :disabled="!rightPhone" class="get_verification" :class="{right_phone:rightPhone}" @click.prevent="getCode">
                {{computeTime>0?`已发送(${computeTime}s)`:'获取验证码'}} 
              </button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code"/>
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on:!loginWay}">
            <section>
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name"/>
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd"/>
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd"/>
                <div class="switch_button" @click="showPwd=!showPwd" :class="showPwd?'on':'off'">
                  <div class="switch_circle" :class="{right:showPwd}"></div>
                  <span class="switch_text">{{showPwd?'abc':'...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha"/>
                <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha" @click="getCaptcha" ref="captcha"/>
              </section>
            </section> 
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
     <AlertTip :alertText="alertText" v-show="showAlert" @closeTip="closeTip"></AlertTip>
  </section>
</template>

<script>
import AlertTip from '../../components/AlertTip/AlertTip'
import {reqSendCode,reqPwdLogin,reqSmsLogin} from '../../api/index'
export default {
  name: "",
  data() {
    return {
      loginWay:true, //true代表短信登陆 false代表密码登陆
      phone:"", //手机号
      computeTime:0,
      showPwd: false,
      name:'',//用户名
      pwd: '', //密码
      code:'',//短信验证码
      captcha:'',//图形验证码
      alertText:"",//提示文本
      showAlert:false,//是否显示提示框
    };
  },
  methods: {
    //异步获取短信验证码
      async getCode(){
          if(!this.computeTime){
            //启动倒计时
            this.computeTime = 30;
              this.intervalId = setInterval(()=>{
                this.computeTime--;
                if(this.computeTime<=0){
                  //停止计时器
                  clearInterval(this.intervalId);
                }
              },1000);
              //发送ajax请求(向指定的手机)
              const result = await reqSendCode(this.phone);
              if(result.code===1){
                //显示提示
                this.alertShow(result.msg);
                //停止倒计时
                if(this.computeTime){
                  this.computeTime=0;
                  clearInterval(this.intervalId);
                  this.intervalId = undefined;
                }
              }
            }
        },
    //异步登陆
      async login(){
        let  result;
        //前台表单验证
        if(this.loginWay){ //短信登陆
          const {rightPhone,phone,code} = this;
          if(!this.rightPhone){
            //手机号不正确
            this.alertShow('手机号不正确');
          }else if(!/^\d{6}$/.test(code)){
            //验证码必须是6位数字
            this.alertShow('验证码必须是6位数字');
          }
          //发送异步的ajax请求验证码登陆
          result = await reqSmsLogin({phone,code});
         
        }else{ //密码登陆
          const {name,pwd,captcha} = this;
          if(!this.name){
            //用户名必须指定
            this.alertShow('用户名必须指定');
          }else if(!this.pwd){
            //密码必须指定
            this.alertShow('密码必须指定');
          }else if(!this.captcha){
            //验证码必须指定
            this.alertShow('验证码必须指定');
          }
          //发送异步的ajax请求短信登陆
         result = await reqPwdLogin({name,pwd,captcha});
        }
         //停止倒计时
        if(this.computeTime){
          this.computeTime=0;
          clearInterval(this.intervalId);
          this.intervalId = undefined;
        }
        //根据结果数据统一处理
        if(result.code ===0){
           const user = result.data;
           //讲user保存到vuex中去
           this.$store.dispatch("recordUser",user);
           //去个人中心页面
           this.$router.replace('/profile');
        }else{
           const msg = result.msg;
           this.alertShow(msg);
           //重新加载验证码
           this.getCaptcha();
        }
      },
      //封装提示框的操作
      alertShow(alertText){
        this.showAlert = true;
        this.alertText = alertText;
      },
      //关闭警告框
      closeTip(){
        this.showAlert = false;
      },
      //获取图片验证码
      getCaptcha(){
        //每次指定的src值不一样 src绕过同源策略
        this.$refs.captcha.src = 'http://localhost:4000/captcha?time='+Date.now();
      }
  },
  computed:{
    rightPhone(){ //测试手机号格式是否正确
      return /^1[3456789]\d{9}$/.test(this.phone);
    }
  },
  components:{
    AlertTip
  }
};
</script>
<style  lang='stylus' rel='stylesheet/stylus'>
@import "../../common/stylus/mixins.styl"
.loginContainer
      width 100%
      height 100%
      background #fff
      .loginInner
        padding-top 60px
        width 80%
        margin 0 auto
        .login_header
          .login_logo
            font-size 40px
            font-weight bold
            color #02a774
            text-align center
          .login_header_title
            padding-top 40px
            text-align center
            >a
              color #333
              font-size 14px
              padding-bottom 4px
              &:first-child
                margin-right 40px
              &.on
                color #02a774
                font-weight 700
                border-bottom 2px solid #02a774
        .login_content
          >form
            >div
              display none
              &.on
                display block
              input
                width 100%
                height 100%
                padding-left 10px
                box-sizing border-box
                border 1px solid #ddd
                border-radius 4px
                outline 0
                font 400 14px Arial
                &:focus
                  border 1px solid #02a774
              .login_message
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .get_verification
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  border 0
                  color #ccc
                  font-size 14px
                  background transparent
                  &.right_phone
                    color  black
              .login_verification
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .switch_button
                  font-size 12px
                  border 1px solid #ddd
                  border-radius 8px
                  transition background-color .3s,border-color .3s
                  padding 0 6px
                  width 30px
                  height 16px
                  line-height 16px
                  color #fff
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  &.off
                    background #fff
                    .switch_text
                      float right
                      color #ddd
                  &.on
                    background #02a774
                  >.switch_circle
                    position absolute
                    top -1px
                    left -1px
                    width 16px
                    height 16px
                    border 1px solid #ddd
                    border-radius 50%
                    background #fff
                    box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                    transition transform .3s
                    &.right
                      transform translateX(27px)
              .login_hint
                margin-top 12px
                color #999
                font-size 14px
                line-height 20px
                >a
                  color #02a774
            .login_submit
              display block
              width 100%
              height 42px
              margin-top 30px
              border-radius 4px
              background #4cd96f
              color #fff
              text-align center
              font-size 16px
              line-height 42px
              border 0
          .about_us
            display block
            font-size 12px
            margin-top 20px
            text-align center
            color #999
        .go_back
          position absolute
          top 5px
          left 5px
          width 30px
          height 30px
          >.iconfont
            font-size 20px
            color #999
</style>